Holyday is running for the Progressive Conservatives, Milczyn is the Liberals' candidate. P.C. Choo, who is not a Toronto councillor, is running as the candidate for the New Democrats in that same riding.

On Sunday, Ford said that if either Holyday or Milczyn depart Toronto City Hall, that will result in council having to choose whether to appoint someone to fill the vacancy or hold a byelection.

Ford said that if that scenario unfolds, a byelection should take place.

The forthcoming provincial byelections were triggered by the exit of five Liberal MPPs in recent months, including former premier Dalton McGuinty.

Even if the Liberals manage to hold on to the five seats up for grabs, they will remain a minority government. At present, they hold 48 seats in the Ontario legislature, compared to 36 for the Progressive Conservatives and 18 for the New Democrats.

The byelections will be the first to take place since Wynne took the reins of the Ontario Liberal Party in January.

Former councillor will run in east Toronto riding

Elsewhere in Toronto on Sunday, the New Democrats nominated Adam Giambrone to be their candidate in the byelection held in Scarborough-Guildwood.

Giambrone previously served for two terms as a city councillor in Ward 18 Davenport. He also served as the chair of the TTC.

In seeking a provincial seat, Giambrone said that was impressed with Ontario NDP Leader Andrea Horwath and wanted to help get results for people living in the east Toronto riding.

On Sunday, he suggested that it's time for the governing Liberals to go.

"It's an out-of-touch government that’s been around for over 10 years and I think I'm looking for a change," Giambrone said.

He'll be up against Mitzie Hunter, who has been nominated as the Liberal candidate, and Ken Kirupa, the candidate for the Progressive Conservatives.